Combination scraper, charger, and tamper



Patented July 4, w22.

'T. 1. AVRY.

COMBINATION SCRAPER, CHARGER, A'ND TAMPER.

APPLICATION FILED IULY 15.1921.

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THOMAS 1I-AVERY, OF ALBIA, IOWA.

COMBINATION SCRAPER, CHARGER, AND TAMPR.

Application ined July 15,

To all whom t may concern:

Be it known that l, Tiro-Mns J. AVERY, a citizen of the United States, and a resident of Albia, in the county of Monroe and State of Iowa, have invented a new and useful Improvement in Combination Scrapers, Chargers, and Tampers, of which the following is a full, clear, and exact description.

My invention relates to improvements in combination Scrapers, chargers and tampers of the type of construction disclosed in my prior application onv account of which Letters Patent of the United States, No. 1379435 was issued to me on May 2%, 1921, and it consists in the combinations, constructions and arrangements herein described and claimed: j

A11 object of my invention is to provide a device of the character described having a charging barrel of uniform diameter and a coupling member having a diameter not greater than that of the barrel for connecting the latter with an operating rod, where- Vby an explosive charge can be effectively tamped in a bore or hole in the face of the -mine wall withoutA any part of thecharge being withdrawn whenl the charging barrel is retracted.

A further object of Amy invention is to provide a deviceof the character described that is relatively simple in construction and operation and thoroughly effective for the purpose for which int-ended.

Other objects and advantages will appear in the following specification, and the novel features of the invention Awill be vparticularly pointed out in the appended caims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which-f Fig. 1 is a plan view of the device,

Fig. 2 is a longitudinal section'through the device, portions thereof being shown in elevation,

Fig. 3 is an end view of a portion of the device,

Fig. lis a detail,v partly in section, of a fragmentary portion of the mechanism shown in Fig. 1.

In carrying out my invention, I provide a substantially cylindrical barrel or charging tube 1. The barrel or tube 1 has concentric inner and outer walls, the outer wall being uniform in diameter for its entire Specification of Letters Patent.

Patented July d, 1922. 1921. seriai'No. 484,975.

outer wall thereof is cut away at 5 to pro' vide an end portion 2 adapted to it into the bore of the barrel 1 and to define a shoulder G adapted to abut the adjacent end wall of the barrel 1. The end portion 2 of the ring a may have a friction tight connection with the barrel 1 and is additionally secured to the latter in any suitable manner as by being soldered thereto. The inner wall of the coupling ring 41 has a diameter less than that of the inner wall of the barrel 1 and projects inwardly beyond the latter to provide an annular stop member 7, as best seen in 'Fig'. 4. The ring 4L is formed with integral rearwardly extending arms 8 8 which are bent inwardly toward one another intermediate their length so that the end portions thereof are substantially parallel with `one another and are adapted to straddle a cooperating coupling' member 9. The latter is rigidly secured to a tube 10 in axial alinement with the latter.

The coupling member 9 has its outer wall Hattened at cliametrically opposed points to: engage with the parallel portions of the arms 8-8 Pivot pins 11-11 are projected throughregistering openings in the parallel portions of the arms 8 8 and the flattened portionsof the wall of the coupling 9, whereby the barrel 1 may be swung 90O about the axis of ythe pivot pins 11-11 and is held against further movement by means which will be hereinafter described.

The coupling member 9 is provided with a bore 12 which is enlarged at 13, as shown in Fig. 4. A rod 1a is arranged to enter the bore 12 and is provided with. a reduced portion 15 having' straight o-pposite walls 16 'and 17 and being projected into a slot 18 in the adjacent end of a plunger stem 19. A pivotv pin 2O secures the reduced portion 15 to the plunger stem 19, as shown. The plunger stem 19 is formed with parallel sides 21-21 adapted to slidably Contact with parallel portions 22-22 of the inner walls of thev bore 13, whereby the plunger stem is held against rotation,'but is permitted to move upwardly about the axis of the pivot pin 2O through an opening 23 extending from the inner to the outer walls of the coupling member 9, las shown. The rod 14 carries a scraper 24 at its end remote from the barrel. The scraper 24 has a shank or stem secured to the rod 14 and this stem has an outwardly projecting stud 25 adapted to cooperate with a slot 2G in a retaining sleeve 2T that is connected with the tube 1 0, whereby the rod 14 may be locked against axial movement in the manner described in the aforesaid patentl issued to me.

The plunger rod 179 is integral with a plunger 28 arranged for reciprocation in the barrel 1. The plunger 28 constitutes the ejecting and tamping member of the device and the outer face thereof Vis therefore formed to provide a substantially plane` surtace.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. The stud 25 is moved axially to occasion a re traction of thepluiiger 28 in the barrel 1. The barrel 1 is then swung upwardly about an axis coinciding with the axes of the pivot pins 11-11 andthe pivot pin 2O (see Figures 2 and 4) into a position at right angles to the sleeveV 10. The engagement of the sides of the plunger stein 19 with the contiguous side walls of the bore of the coupling member 9 will prevent the rotation. of the barrel 1 about the axis of the rod 14. An explosive charge is then placed within the barrel 1 and the latter is then moved into axial alinement with the tube 10 and may be projected into a bore or hole in a mine wall. The scraper member 24 can be grasped conveniently when it is desired to move the rod 14 in the direction of its length and when the barrel 1 has been projected into the bore or hole in the mine hole, the scraper member 24 may be shoved forwardly to 'occasion the ejection of the exn vplosive charge from the barrel 1. rlhe stud 25 is then moved along the slot 26 to loch the rod 14 to the tube o-r sleeve V10,'and the device is operated as a. unit to occasion the tamping oi' the explosive charge in the hole in the mine wall. It is important to note that the outer wall of the barrel 1 is uni't'orm in dia-meter tor its entire length. Consequently, the device may be used in placing `an `explosive charge in bores having a diameter but slightly greater than that 'of the barrel 1. The outerwall of the barrel 1 is smooth and there are no outwardly rotruding parts to occasion the withdrawa. of any part of the explosive charge from the bore in the mine wall or to interfere with the' functioning of the device as a tamping tool. The vannular shoulder 7 provides a stop member which limits the movement of the plunger 28 toward the coupling member 9 and insures the alinement of the axis of the pivot pin 2O with the axes of the pivot pins 11-11. It will bev observed that the arms 8;-8 are provided with alined openings 3'3. These openings 3-3 are adapted to register with alined openings 29-29 through the wallsV oit the coupling member 9 when the barrel 1 has been, moved into the position indicated by the dotted lines in Fi' g. 2. The rod 14 may be moved until the plunger 'shank 19 is positioned as indicated by the dotted lines in Fig. 2, at which time an opening 30 through the plunger shank 19 is in registry with the openings 3 3-, 29-.-29. A cotter pin 31 may be projected through the registering openings to prevent axial movement of the rod 14 relative to the sleeve 10. The rod 14 is thus held in extended position and in consequence drillings or the like may be removed from holes of greater depth than is possible when the parts of the device vare Yin the position illustrated in Fig. 1, the effect of securing the plunger shank in the osition indicated by the dotted lines in ig. 2 being to lengthen the device.

I claim:

1. In a device of the characterdescribed, a tubularr charge receiving member of uniform outside diameter for, its entire length, acoupling ring secured to the charge receiving member at one end ot and in axial alinement with the latter, said coupling ring having an outside diameter substantially equal to that, of the 'charge receiving member, an

inside diameter less than that of the charge receiving member, and being formed with a pair of inwardly oiset arms, a second tubular member, a second` coupling member carried at one end oi' the second tubular member and pivotally supported between the arms of the first. named coupling member, a rod slidable in the second named tubular member, and a plunger slidably` disposed in the charge receiving member and provided with a shank pivoted at its end te the adj acent end of the said Vslidable rod.

2. In a device'oi'' the character described, a tubular charge receiving member oit' uniform outside diameter for its entire length, a coupling ring secured to the charge receiving member at one end of and in axial alinemeiit with the latter, said coupling ring having 'an 'outside diameter substantiallyT equal to that ot the charge receiving niember, an inside vdiameter less than that ot the charge receiving member, and being formed with a pair of inwardly oiiset arms, a. second tubular member, a second 'coupling member carried by the second tubular member and being pivoted intermediately between said arms, said second named coupling member being provided with abore axially alined with the bores of the tubular charge receiving member and of the second named tubular member, 'and being provided with a slot extending inwardly from the 'end thereof adjacent to the charge receiving member, portion of the opposite inner wall of the second named coupling member being straight and parallel, a rod slidable in the second named tube and projecting through the secmovement of the charge receiving memb'er ond named coupling member, and ay plunger about an axis coinciding With the axes of slidably disposed in the charge receiving the pivot pins connecting the said coupling l0 member and having :i shank pivoted at its members and for preventing rotation of the 5 end to the end of the rod, said shank being Charge receiving membei` relative to the seoadapted to co-aot with the slot in the second ond named couplin member. named coupling member to permit e limited T CMAS J. AVERY. 

